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  <title>Document</title>
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<body>
  <script>
    let arr = ['pink', 'hotpink']
    // 新增  push 推末尾
    // console.log(arr.push('deeppink'))  // 3
    // arr.push('deeppinnk', 'linghtpink')
    // console.log(arr)
    // 开头追加
    arr.unshift('red')
    console.log(arr)
  </script>
</body>

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